Headphone



FIG. 1 is a top front perspective view of the headphone;

FIG. 2 is a top rear perspective view of the headphone;

FIG. 3 is a bottom front perspective view of the headphone;

FIG. 4 is a front elevation view of the headphone;

FIG. 5 is a rear elevation view of the headphone;

FIG. 6 is a top plan view of the headphone;

FIG. 7 is a bottom plan view of the headphone;

FIG. 8 is a right side elevation view of the headphone; and,

FIG. 9 is a left side elevation view of the headphone.

The broken lines show portions of the claimed design that are environment; the broken lines form no part of the claimed design. 

CLAIM The ornamental design for a headphone, as shown and described. 